/* LE CAHIER SEYÈS — peau du cahier de dressage.
   Réglure bleue, marge rouge, encre violette, notes à la main. */

@font-face{font-family:'rda-titre';src:url('rda-titre-400.woff2') format('woff2');font-weight:400;font-style:normal;font-display:swap}
@font-face{font-family:'rda-texte';src:url('rda-texte-400.woff2') format('woff2');font-weight:400;font-style:normal;font-display:swap}
@font-face{font-family:'rda-texte';src:url('rda-texte-400it.woff2') format('woff2');font-weight:400;font-style:italic;font-display:swap}
@font-face{font-family:'rda-texte';src:url('rda-texte-500.woff2') format('woff2');font-weight:500;font-style:normal;font-display:swap}
@font-face{font-family:'rda-texte';src:url('rda-texte-700.woff2') format('woff2');font-weight:700;font-style:normal;font-display:swap}
@font-face{font-family:'rda-note';src:url('rda-note-500.woff2') format('woff2');font-weight:500;font-style:normal;font-display:swap}
@font-face{font-family:'rda-note';src:url('rda-note-700.woff2') format('woff2');font-weight:700;font-style:normal;font-display:swap}

:root{
  --papier:#f9f4f1;
  --buvard:#ecdcd8;
  --fiche:#fffcfa;
  --encre:#241f33;
  --violet:#4b3f96;
  --violet-plein:#4a2fb8;
  --reglure:#b7c9e6;
  --reglure-forte:#8fa9d4;
  --rouge:#a93b31;
  --rouge-plein:#b3271e;
  --marge-x:5rem;
  --rayon-carte:10px;
  --rayon-note:14px;
  --rayon-bouton:8px;
  --rayon-pastille:999px;
  --rayon-encart:18px;
  --ombre-page:0 2px 6px rgba(36,31,51,.10), 0 10px 26px rgba(36,31,51,.09);
  --ombre-note:0 1px 3px rgba(36,31,51,.12), 0 8px 18px rgba(36,31,51,.10);
  --ombre-releve:0 4px 14px rgba(36,31,51,.14);
  --ft:'rda-titre',Palatino,Georgia,serif;
  --fx:'rda-texte','Segoe UI',sans-serif;
  --fn:'rda-note',cursive;
}
/* Encre d'accent par cahier */
[data-cahier]{--rc:var(--violet, #4b3f96)}
[data-cahier="le-terrain"]{--rc:#2f6b4f}
[data-cahier="le-registre"]{--rc:#8a5a20}
[data-cahier="la-portee"]{--rc:#8a2f55}
[data-cahier="les-exercices"]{--rc:#4a2fb8}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;color:var(--encre);font-family:var(--fx);font-size:1.0625rem;line-height:1.65;
  background-color:var(--papier);
  background-image:
    repeating-linear-gradient(to bottom, transparent 0, transparent 7px, rgba(183,201,230,.34) 7px, rgba(183,201,230,.34) 8px),
    repeating-linear-gradient(to bottom, transparent 0, transparent 31px, rgba(143,169,212,.5) 31px, rgba(143,169,212,.5) 32px);
}
img{max-width:100%;height:auto;display:block}
a{color:var(--violet);text-decoration-thickness:1px;text-underline-offset:.16em}
a:hover{color:var(--rouge)}
h1,h2,h3{font-family:var(--ft);font-weight:400;line-height:1.18;letter-spacing:.01em}

.rda-acces-direct{position:absolute;left:-9999px;top:0;background:var(--rouge-plein, #b3271e);color:#fff;padding:.5rem 1rem;z-index:60;border-radius:var(--rayon-bouton)}
.rda-acces-direct:focus{left:.5rem;top:.5rem}

/* ---------- COUVERTURE ---------- */
.rda-couverture__bande{background:var(--violet-plein, #4a2fb8);color:#fff;box-shadow:0 2px 0 rgba(36,31,51,.2)}
.rda-couverture__marges{max-width:72rem;margin:0 auto;padding:1.4rem 1.25rem 0 5.2rem;position:relative}
.rda-couverture__marges::before{content:"";position:absolute;left:3.4rem;top:0;bottom:0;width:2px;background:#e8b0aa}
.rda-enseigne{display:flex;align-items:center;gap:.9rem;color:#fff;text-decoration:none}
.rda-enseigne__marque{width:2.6rem;height:2.6rem;flex:none;color:#f3d8d5}
.rda-enseigne__nom{font-family:var(--ft);font-size:1.9rem;letter-spacing:.02em}
.rda-devise{margin:.15rem 0 0 3.5rem;font-family:var(--fn);font-size:1.35rem;font-weight:500;color:#f3d8d5;transform:rotate(-.6deg)}
.rda-sommaire-nav{margin-top:1rem}
.rda-sommaire-nav ul{list-style:none;display:flex;flex-wrap:wrap;gap:.35rem .5rem;margin:0;padding:0}
.rda-sommaire-nav__lien{display:inline-block;padding:.45rem .95rem;border-radius:var(--rayon-pastille);font-size:.92rem;font-weight:500;letter-spacing:.04em;text-transform:uppercase;color:#fff;text-decoration:none;border:1px solid rgba(255,255,255,.35)}
.rda-sommaire-nav__lien:hover{background:rgba(255,255,255,.14);color:#fff}
.rda-sommaire-nav__lien[aria-current="page"]{background:var(--fiche);color:var(--rc, #4a2fb8);border-color:var(--fiche)}
.rda-sommaire-nav__lien[data-cahier="le-terrain"][aria-current="page"]{color:#2f6b4f}
.rda-pli{display:none;margin:.8rem 0 1rem}
.rda-pli summary{cursor:pointer;font-weight:700;letter-spacing:.06em;text-transform:uppercase;font-size:.9rem}
.rda-pli ul{list-style:none;padding:.6rem 0 0 1rem;margin:0}
.rda-pli li{margin:.3rem 0}
.rda-pli a{color:#fff}

/* ---------- LE CADRE À MARGE ---------- */
.rda-marges{max-width:72rem;margin:0 auto;padding:0 1.25rem 0 var(--marge-x);position:relative}
.rda-marges::before{content:"";position:absolute;left:calc(var(--marge-x) - 1.6rem);top:0;bottom:0;width:2px;background:var(--rouge)}

/* ---------- PREMIÈRE PAGE ---------- */
.rda-premiere{padding:2.6rem 0 1.2rem}
.rda-premiere__grille{display:grid;grid-template-columns:minmax(0,1fr) 14rem;gap:2rem;align-items:start}
.rda-premiere h1{font-size:2.9rem;margin:.1rem 0 .8rem;color:var(--encre)}
.rda-premiere__intro{font-size:1.18rem;max-width:44rem}
.rda-premiere__intro::first-letter{font-family:var(--fn);font-size:2.4rem;font-weight:700;color:var(--violet-plein);line-height:.8;vertical-align:-.28em;padding-right:.06em}
.rda-premiere--cahier h1{color:var(--rc, #4a2fb8)}
.rda-note-marge{font-family:var(--fn);font-size:1.5rem;font-weight:500;color:var(--violet);line-height:1.25;transform:rotate(2deg)}
.rda-note-marge p{margin:0;border-left:3px solid var(--rouge);padding-left:.8rem}
.rda-compte{list-style:none;display:flex;gap:1.6rem;padding:1rem 0 0;margin:1.4rem 0 0;border-top:1px solid var(--reglure-forte)}
.rda-compte__case{display:flex;flex-direction:column}
.rda-compte__chiffre{font-family:var(--ft);font-size:1.7rem;color:var(--rouge)}
.rda-compte__libelle{font-size:.8rem;letter-spacing:.08em;text-transform:uppercase;color:#5d5570}

/* ---------- TÊTES DE CAHIER ---------- */
.rda-cahier{padding:2.2rem 0 .4rem}
.rda-cahier__tete{display:flex;align-items:baseline;justify-content:space-between;gap:1rem;border-bottom:3px double var(--reglure-forte);padding-bottom:.5rem;margin-bottom:1.4rem}
.rda-cahier__tete h2{font-size:1.65rem;margin:0}
.rda-cahier__tete h2 a{color:var(--encre);text-decoration:none}
.rda-cahier__tete h2 a:hover{color:var(--rc, #4a2fb8)}
.rda-cahier__phrase{margin:0;font-family:var(--fn);font-size:1.3rem;color:var(--violet);max-width:32rem;text-align:right}
.rda-cahier__decompte{font-family:var(--fn);font-size:1.4rem;color:var(--rouge)}
.rda-rayon[data-cahier] .rda-cahier__tete h2 a:hover{color:var(--rc)}

/* ---------- LA PAGE-CARTEL ---------- */
.rda-page{position:relative;background:var(--fiche);border:1px solid rgba(143,169,212,.55);border-radius:var(--rayon-carte);box-shadow:var(--ombre-page);padding:1.1rem 1.15rem 1rem;display:grid;grid-template-columns:13rem minmax(0,1fr);gap:1.15rem;margin-bottom:1.15rem}
.rda-page::before{content:"";position:absolute;left:.55rem;top:.55rem;bottom:.55rem;width:1px;background:var(--rouge);opacity:.55}
.rda-page[data-sans-vignette]{grid-template-columns:minmax(0,1fr)}
.rda-page--ligne{grid-template-columns:8.5rem minmax(0,1fr);padding:.85rem .95rem .8rem}
.rda-page--muette{grid-template-columns:minmax(0,1fr)}
.rda-page__vignette{margin:0;border-radius:6px;overflow:hidden;border:1px solid rgba(36,31,51,.14);background:var(--buvard)}
.rda-page__vignette img{width:100%;height:100%;object-fit:cover;aspect-ratio:4/3}
.rda-page--ligne .rda-page__vignette img{aspect-ratio:1/1}
.rda-cartel{display:flex;align-items:center;gap:.6rem;margin:0 0 .35rem}
.rda-cartel__cote{display:inline-block;font-family:var(--ft);font-size:.78rem;letter-spacing:.1em;color:#fff;background:var(--rc, #4a2fb8);border-radius:var(--rayon-pastille);padding:.14rem .6rem}
.rda-cartel__cahier{font-size:.74rem;letter-spacing:.12em;text-transform:uppercase;color:#6b6380}
.rda-page__titre{font-size:1.28rem;margin:.1rem 0 .35rem}
.rda-page__titre a{color:var(--encre);text-decoration:none}
.rda-page__titre a:hover{color:var(--rc, #4a2fb8);text-decoration:underline;text-decoration-color:var(--rouge)}
.rda-page__usage{margin:.2rem 0 .5rem;font-size:.97rem;color:#3f3852}
.rda-page__date{margin:0;font-size:.8rem;color:#6b6380;letter-spacing:.05em}
.rda-page__renvoi{margin:.2rem 0 1.6rem;text-align:right}
.rda-renvoi{display:inline-block;font-weight:700;font-size:.92rem;letter-spacing:.05em;text-transform:uppercase;color:#fff;background:var(--rc, #4a2fb8);text-decoration:none;padding:.55rem 1.15rem;border-radius:var(--rayon-bouton);box-shadow:var(--ombre-note)}
.rda-renvoi:hover{background:var(--rouge-plein, #b3271e);color:#fff}

/* ---------- PLANCHES DE L'ACCUEIL ---------- */
.rda-duo-plomb{display:grid;grid-template-columns:minmax(0,1fr) 19rem;gap:1.6rem;align-items:start}
.rda-duo-plomb__main .rda-page:first-child{grid-template-columns:15rem minmax(0,1fr)}
.rda-duo-plomb__main .rda-page:first-child .rda-page__vignette{min-height:11rem}
.rda-duo-plomb__main .rda-page:first-child .rda-page__titre{font-size:1.9rem}
.rda-lignes{background:var(--fiche);border:1px dashed var(--reglure-forte);border-radius:var(--rayon-encart);padding:1.1rem 1.15rem;box-shadow:var(--ombre-note)}
.rda-lignes__titre{font-family:var(--fn);font-size:1.55rem;color:var(--rouge);margin:.1rem 0 .8rem;font-weight:700}
.rda-lignes__liste{list-style:none;margin:0;padding:0}
.rda-lignes__item{padding:.7rem 0;border-top:1px solid rgba(183,201,230,.7)}
.rda-lignes__item .rda-cartel{margin-bottom:.15rem}
.rda-lignes__lien{font-family:var(--ft);font-size:1.05rem;color:var(--encre);text-decoration:none}
.rda-lignes__lien:hover{color:var(--rc, #4a2fb8)}
.rda-lignes__usage{margin:.2rem 0 0;font-size:.85rem;color:#5d5570}
.rda-table{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem}

/* ---------- NOTE DE SAISON ---------- */
.rda-note-saison{margin:1.8rem 0 0;background:var(--rouge-plein, #b3271e);color:#fdf3f1;border-radius:var(--rayon-encart);padding:1.5rem 1.8rem;box-shadow:var(--ombre-releve);transform:rotate(-.4deg)}
.rda-note-saison h2{font-family:var(--fn);font-weight:700;font-size:1.7rem;margin:.1rem 0 .4rem}
.rda-note-saison p{margin:0;max-width:52rem}

/* ---------- INTERCALAIRE RÉSEAU ---------- */
.rda-intercalaire{margin:2.4rem 0 3rem;background:var(--fiche);border-radius:var(--rayon-encart);border:1px solid rgba(143,169,212,.55);box-shadow:var(--ombre-page);padding:1.5rem 1.8rem}
.rda-intercalaire__tete h2{font-size:1.5rem;margin:0 0 .2rem}
.rda-intercalaire__phrase{margin:0 0 1rem;font-family:var(--fn);font-size:1.3rem;color:var(--violet)}
.rda-ailleurs__liste{list-style:none;margin:0;padding:0;columns:2;column-gap:2.2rem}
.rda-ailleurs__item{break-inside:avoid;padding:.55rem 0;border-top:1px solid rgba(183,201,230,.7);font-size:.95rem}
.rda-ailleurs__item p{margin:0}
.rda-ailleurs__item a{font-weight:700}

/* ---------- REMONTÉE + ONGLETS ---------- */
.rda-remontee{padding:1rem 0 .2rem}
.rda-remontee ol{list-style:none;display:flex;flex-wrap:wrap;gap:.4rem;margin:0;padding:0;font-size:.82rem;letter-spacing:.06em;text-transform:uppercase;color:#6b6380}
.rda-remontee li+li::before{content:"›";margin-right:.4rem;color:var(--rouge)}
.rda-remontee a{color:#6b6380}
.rda-onglets{display:flex;flex-wrap:wrap;gap:.5rem;margin:.9rem 0 1.4rem}
.rda-onglet{padding:.4rem 1rem;border:1.5px solid var(--rc, #4a2fb8);border-radius:var(--rayon-pastille);color:var(--rc, #4a2fb8);text-decoration:none;font-size:.88rem;font-weight:700;letter-spacing:.05em;text-transform:uppercase}
.rda-onglet:hover{background:var(--rc, #4a2fb8);color:#fff}
.rda-onglet--courant{background:var(--rc, #4a2fb8);color:#fff}

/* ---------- PAGE ENTIÈRE (article) ---------- */
.rda-page-entiere{padding-bottom:.6rem}
.rda-entete-page{padding:1.2rem 0 .4rem}
.rda-entete-page h1{font-size:2.5rem;margin:.35rem 0 .6rem}
.rda-entete-page .rda-cartel__cahier{color:var(--rc, #4a2fb8);text-decoration:none;font-weight:700}
.rda-chapeau{font-size:1.16rem;max-width:46rem;font-style:italic;color:#3f3852}
.rda-datation{font-size:.85rem;color:#6b6380;letter-spacing:.04em}
.rda-planche{margin:1.4rem 0 0;border-radius:var(--rayon-carte);overflow:hidden;border:1px solid rgba(36,31,51,.16);box-shadow:var(--ombre-page);background:var(--buvard)}
.rda-planche figcaption{font-size:.85rem;color:#4a4360;padding:.6rem .95rem;background:var(--fiche);border-top:1px solid rgba(183,201,230,.6);font-style:italic}
.rda-duo{display:grid;grid-template-columns:minmax(0,1fr) 15.5rem;gap:2.2rem;padding-top:1.8rem}
.rda-texte{font-size:1.05rem;max-width:44rem}
.rda-texte h2{font-size:1.55rem;margin:2rem 0 .6rem;color:var(--rc, #4a2fb8)}
.rda-texte h3{font-size:1.2rem;margin:1.5rem 0 .4rem}
.rda-texte p{margin:.85rem 0}
.rda-texte ul,.rda-texte ol{padding-left:1.3rem}
.rda-texte blockquote{margin:1.2rem 0;padding:.8rem 1.1rem;border-left:3px solid var(--rouge);background:rgba(183,201,230,.16);font-style:italic;border-radius:0 var(--rayon-bouton) var(--rayon-bouton) 0}
.rda-bord{align-self:start;position:sticky;top:1rem}
.rda-bord h2{font-family:var(--fn);font-weight:700;font-size:1.5rem;color:var(--rouge);margin:0 0 .5rem}
.rda-bord h2+h2{margin-top:1.4rem}
.rda-bord__sommaire,.rda-bord__sources{margin:0;padding:0 0 0 1.1rem}
.rda-bord__sommaire li,.rda-bord__sources li{margin:.35rem 0;font-size:.92rem}
.rda-bord__sources{list-style:none;padding-left:0}
.rda-bord__sources a{word-break:break-all;font-size:.85rem}
.rda-voisinage{padding-bottom:2.6rem}
.rda-duo-voisines{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1rem}
.rda-duo-voisines .rda-page{grid-template-columns:minmax(0,1fr);margin-bottom:0}
.rda-duo-voisines .rda-page__vignette img{aspect-ratio:16/10}

/* ---------- BUVARD (pied) ---------- */
.rda-buvard{margin-top:2.5rem;background:var(--buvard);border-top:3px double var(--reglure-forte)}
.rda-buvard__marges{max-width:72rem;margin:0 auto;padding:2rem 1.25rem 1.4rem 5.2rem;position:relative}
.rda-buvard__marges::before{content:"";position:absolute;left:3.4rem;top:0;bottom:0;width:2px;background:var(--rouge)}
.rda-buvard__colonnes{display:grid;grid-template-columns:2fr 1fr 1fr;gap:2rem}
.rda-buvard__col h2{font-family:var(--fn);font-weight:700;font-size:1.45rem;color:var(--violet);margin:0 0 .5rem}
.rda-buvard__col ul{list-style:none;margin:0;padding:0}
.rda-buvard__col li{margin:.3rem 0}
.rda-buvard__col p{margin:.3rem 0;font-size:.94rem}
.rda-buvard__note{font-family:var(--fn);font-size:1.2rem;color:var(--rouge);transform:rotate(-.5deg)}
.rda-buvard__ligne{margin-top:1.6rem;padding-top:.8rem;border-top:1px solid rgba(36,31,51,.18);font-size:.8rem;letter-spacing:.08em;text-transform:uppercase;color:#5d5570}

/* ---------- ÉTROIT ---------- */
@media (max-width:64rem){
  :root{--marge-x:3.4rem}
  .rda-premiere__grille{grid-template-columns:minmax(0,1fr)}
  .rda-note-marge--accueil{display:none}
  .rda-duo-plomb{grid-template-columns:minmax(0,1fr)}
  .rda-duo{grid-template-columns:minmax(0,1fr)}
  .rda-bord{position:static}
  .rda-duo-voisines{grid-template-columns:minmax(0,1fr)}
  .rda-table{grid-template-columns:minmax(0,1fr)}
  .rda-ailleurs__liste{columns:1}
  .rda-buvard__colonnes{grid-template-columns:minmax(0,1fr)}
  .rda-couverture__marges{padding-left:3.6rem}
  .rda-couverture__marges::before{left:2.1rem}
  .rda-buvard__marges{padding-left:3.6rem}
  .rda-buvard__marges::before{left:2.1rem}
  .rda-sommaire-nav{display:none}
  .rda-pli{display:block;padding-bottom:.8rem}
  .rda-enseigne__nom{font-size:1.45rem}
  .rda-devise{margin-left:0;font-size:1.2rem}
  .rda-page{grid-template-columns:minmax(0,1fr)}
  .rda-page__vignette img{aspect-ratio:16/9}
  .rda-page--ligne{grid-template-columns:minmax(0,1fr)}
  .rda-premiere h1{font-size:2.1rem}
  .rda-entete-page h1{font-size:1.9rem}
}